CVE-2021-3181
Medium
Description
rfc822.c in Mutt through 2.0.4 allows remote attackers to cause a denial of service (mailbox unavailability) by sending email messages with sequences of semicolon characters in RFC822 address fields (aka terminators of empty groups). A small email message from the attacker can cause large memory consumption, and the victim may then be unable to see email messages from other persons.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Mutt
PublishedJan 19, 2021
First seenJan 19, 2021
How to fix
Vendor advisories
- security.gentoo.org/glsa/202101-25
- debian.org/security/2021/dsa-4838
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P2OMLQKAOHPYQA4GI7ZUO6UKCPUHLYO7/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DXGWXFO77HBCD3VYEIYHHYU33LYWWWNQ/
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mutt mutt | v ≤ 2.0.4 | — |
| debian debian_linux | 9.0, 10.0 | — |
| fedoraproject fedora | 32, 33 | — |
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